Custom assets from Forge mods not loading?

I switched my server type to forge 1.12.2 and uploaded custom npcs and varried commodities by Noppes to use in the server, the mod files seem to work somewhat as the menus the extra items are supposed to appear in are there but none of the items are present.

Example: Registry Block: Found a missing id from the world customnpcs:npcscripteddoor

None of the npcs added show up in the server either. weather of not this is due to the custom assets not loading in im not sure. any and all help is appreciated

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